I'm implementing the IChestLid interface, and doing everything basically the same as in the vanilla chest and in the iron chests mod, yet still whenever it gets the openness value in the tile entity renderer it's always 0. 

This is where I get the openness value:

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float f1 = iCallbackWrapper.apply(TabulatedChest.getLid(tileEntity)).get(partialTicks);

 

And everywhere I set the value of the lid angle

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@Override
    public void tick()
    {
        int i = this.worldPosition.getX();
        int j = this.worldPosition.getY();
        int k = this.worldPosition.getZ();
        ++this.ticksSinceSync;
        this.numPlayersUsing = getNumberOfPlayersUsing(this.level, this, this.ticksSinceSync, i, j, k, this.numPlayersUsing);
        this.prevLidAngle = this.lidAngle;
        float f = 0.1F;

        if (this.numPlayersUsing > 0 && this.lidAngle == 0.0F)
        {
            this.playSound(SoundEvents.CHEST_OPEN);
        }

        if (this.numPlayersUsing == 0 && this.lidAngle > 0.0F || this.numPlayersUsing > 0 && this.lidAngle < 1.0F)
        {
            float f1 = this.lidAngle;
            if (this.numPlayersUsing > 0)
            {
                this.lidAngle += 0.1F;
            }
            else
            {
                this.lidAngle -= 0.1F;
            }

            if (this.lidAngle > 1.0F)
            {
                this.lidAngle = 1.0F;
            }

            float f2 = 0.5F;
            if (this.lidAngle < 0.5F && f1 >= 0.5F)
            {
                this.playSound(SoundEvents.CHEST_CLOSE);
            }

            if (this.lidAngle < 0.0F)
            {
                this.lidAngle = 0.0F;
            }
        }
    }

 

And lastly where I get the value:

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@Override
  public float getOpenNess(float time)
{
  return MathHelper.lerp(time, prevLidAngle, lidAngle);
}

@OnlyIn(Dist.CLIENT)
    public static TileEntityMerger.ICallback<TabulatedTile, Float2FloatFunction> getLid(final IChestLid lid)
    {
        return new TileEntityMerger.ICallback<TabulatedTile, Float2FloatFunction>()
        {
            @Override
            public Float2FloatFunction acceptDouble(TabulatedTile firstTile, TabulatedTile secondTile)
            {
                return (p_226921_2_) -> Math.max(firstTile.getOpenNess(p_226921_2_), secondTile.getOpenNess(p_226921_2_));
            }

            @Override
            public Float2FloatFunction acceptSingle(TabulatedTile p_225538_1_)
            {
                return p_225538_1_::getOpenNess;
            }

            @Override
            public Float2FloatFunction acceptNone()
            {
                return lid::getOpenNess;
            }
        };
    }

 

Any help's appreciated

Fixed it, just had to override the triggerEvent method in the blocks class so it'd happen in the tile entity, so that the lid data would be synced between the client and server